High contrast surface marking using metal oxides
US6313436A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 5, 2000 |
| Grant date | Nov 6, 2001 |
| Priority date | — |
| Expiry date | Jan 5, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C23/0025
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method of laser marking metals, plastics, ceramic materials, glazes, glass ceramics, and glasses of any desired form, which comprises applying to the material to be marked a variable thickness layer of marking material containing energy absorbing enhancers then irradiating said layer with a laser or diode based energy source such that the radiation is directed onto said layer in accordance with the form of the marking to be applied, and using a laser or diode based energy source of a wavelength which is sufficiently absorbed by the marking material so as to create a bonding of the marking material to the surface of the workpiece at the irradiated areas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.